package org.tomcat.demo.httpServer.applicationServlet;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;


public class HttpServer {
	/**
	 * WEB_ROOT is the directory where our HTML and other files reside. For this
	 * package, WEB_ROOT is the "webroot" directory under the working directory.
	 * The working directory is the location in the file system from where the
	 * java command was invoked.
	 */
	public static final String WEB_ROOT = System.getProperty("user.dir") + File.separator + "webRoot";
	// shutdown command
	static final String SHUTDOWN_COMMAND = "/SHUTDOWN";
	// the shutdown command received
	private boolean shutdown = false;

	public static void main(String[] args) {
		HttpServer server = new HttpServer();
		server.await();
	}

	public void await() {
		ServerSocket serverSocket = null;
		int port = 8080;
		try {
			serverSocket = new ServerSocket(port, 1, InetAddress.getByName("127.0.0.1"));
		} catch (IOException e) {
			e.printStackTrace();
			System.exit(1);
		}
		// Loop waiting for a request
		while (!shutdown) {
			Socket socket = null;
			InputStream input = null;
			OutputStream output = null;
			try {
				socket = serverSocket.accept();
				input = socket.getInputStream();
				output = socket.getOutputStream();
				// create Request object and parse
				Request request = new Request(input);
				request.parse();
				// create Response object
				Response response = new Response(output);
				response.setRequest(request);

				// check if this is a request for a servlet or
				// a static resource
				// a request for a servlet begins with "/servlet/"
				if (request.getUri().startsWith("/servlet/")) {
					ServletProcessor processor = new ServletProcessor();
					processor.process(request, response);
				} else {
					StaticResourceProcessor processor = new StaticResourceProcessor();
					shutdown = processor.process(request, response);
				}
//				shutdown = response.sendStaticResource();
				// Close the socket
				socket.close();
			} catch (Exception e) {
				e.printStackTrace();
				continue;
			}
		}
	}
}
